@eddi@AndersDeleuran Unfortunately, I have to solve the problem today. The solution seems to be _BoxEdit, but I have not been successful for now. If I do not solve it I will have to manually scale each single ball …

Those aren’t actually spheres and some of them aren’t closed (I’m not sure if Rhino/Grasshopper let’s you reference the sphere type directly). Anywho, since they’re spherical Breps, their centroids are probably okay and we can generate new spheres instead of just setting their radius (which would be faster/cheaper/cleaner):

Thanks for the help, but unfortunately I do not know how to use the grasshopper yet. I see you kindly put in the photo of the components, but I do not know how to do it.
Certainly with time and calm I will give a chance to Grasshoper.

I may be wrong (and I would be happy) but I suspect that Box Edit does not work correctly on Rhino Wip. If I enter the value 0.32 in the size field X, moving to the Y field disappears all the values. @pascal